Add the removing of a jail via the ``/jail delete`` command.

src/main/java/com/graywolf336/jail/JailIO.java

@@ -405,4 +405,26 @@ public class JailIO {
 				break;
 		}
 	}
+	
+	/**
+	 * Removes a jail from the storage system.
+	 * 
+	 * @param name of the jail to remove.
+	 */
+	public void removeJail(String name) {
+		switch(storage) {
+			case 1:
+			case 2:
+				break;
+			default:
+				flat.set("jails." + name, null);
+				
+				try {
+					flat.save(new File(pl.getDataFolder(), "data.yml"));
+				} catch (IOException e) {
+					pl.getLogger().severe("Unable to remove the jail " + name +  " from the storage: " + e.getMessage());
+				}
+				break;
+		}
+	}
 }

src/main/java/com/graywolf336/jail/JailManager.java

@@ -73,6 +73,16 @@ public class JailManager {
 		if(n) plugin.getJailIO().saveJail(jail);
 	}
 	
+	/**
+	 * Removes a {@link Jail}.
+	 * 
+	 * @param name of the jail to remove
+	 */
+	public void removeJail(String name) {
+		this.jails.remove(name);
+		plugin.getJailIO().removeJail(name);
+	}
+	
 	/**
 	 * Gets a jail by the given name.
 	 * 

src/main/java/com/graywolf336/jail/command/JailHandler.java

@@ -18,6 +18,7 @@ import com.graywolf336.jail.command.subcommands.JailCommand;
 import com.graywolf336.jail.command.subcommands.JailCreateCommand;
 import com.graywolf336.jail.command.subcommands.JailDeleteCellCommand;
 import com.graywolf336.jail.command.subcommands.JailDeleteCellsCommand;
+import com.graywolf336.jail.command.subcommands.JailDeleteCommand;
 import com.graywolf336.jail.command.subcommands.JailListCellsCommand;
 import com.graywolf336.jail.command.subcommands.JailListCommand;
 import com.graywolf336.jail.command.subcommands.JailMuteCommand;
@@ -172,6 +173,7 @@ public class JailHandler {
 		load(JailCreateCommand.class);
 		load(JailDeleteCellCommand.class);
 		load(JailDeleteCellsCommand.class);
+		load(JailDeleteCommand.class);
 		load(JailListCellsCommand.class);
 		load(JailListCommand.class);
 		load(JailMuteCommand.class);

src/main/java/com/graywolf336/jail/command/subcommands/JailDeleteCommand.java

@@ -0,0 +1,38 @@
+package com.graywolf336.jail.command.subcommands;
+
+import org.bukkit.command.CommandSender;
+
+import com.graywolf336.jail.JailManager;
+import com.graywolf336.jail.command.Command;
+import com.graywolf336.jail.command.CommandInfo;
+import com.graywolf336.jail.enums.LangString;
+
+@CommandInfo(
+		maxArgs = 1,
+		minimumArgs = 1,
+		needsPlayer = false,
+		pattern = "delete|d",
+		permission = "jail.command.jaildelete",
+		usage = "/jail delete <jail>"
+	)
+public class JailDeleteCommand implements Command {
+	public boolean execute(JailManager jm, CommandSender sender, String... args) throws Exception {
+		//Check if the jail name provided is a valid jail
+		if(jm.isValidJail(args[1])) {
+			//check if the jail doesn't contain prisoners
+			if(jm.getJail(args[1]).getAllPrisoners().size() == 0) {
+				//There are no prisoners, so we can delete it
+				jm.removeJail(args[1]);
+				sender.sendMessage(jm.getPlugin().getJailIO().getLanguageString(LangString.JAILREMOVED, args[1]));
+			}else {
+				//The jail has prisoners, they need to release them first
+				sender.sendMessage(jm.getPlugin().getJailIO().getLanguageString(LangString.JAILREMOVALUNSUCCESSFUL, args[1]));
+			}
+		}else {
+			//No jail found by the provided name
+			sender.sendMessage(jm.getPlugin().getJailIO().getLanguageString(LangString.NOJAIL, args[1]));
+		}
+		
+		return true;
+	}
+}

src/main/java/com/graywolf336/jail/enums/LangString.java

@@ -114,6 +114,8 @@ public enum LangString {
 	CELLREMOVED ("general"),
 	/** The simple word jailing to be put in other parts. */
 	JAILING ("jailing"),
+	/** THe message sent to the sender when they try to remove a jail but there are still prisoners in there. */
+	JAILREMOVALUNSUCCESSFUL ("general"),
 	/** The message sent whenever a jail is successfully removed. */
 	JAILREMOVED ("general"),
 	/** Message sent when doing something that requires a cell but the given name of a cell doesn't exist. */

src/main/resources/en.yml

@@ -12,6 +12,7 @@ language:
     cellremovalunsuccessful: '&cThe removal of cell %0% from jail %1% was unsuccessful because there is a prisoner in there still. Release or transfer before trying to remove the cell again.'
     cellremoved: '&9Cell %0% has been successfully removed from the jail %1%.'
     jailing: '&9jailing'
+    jailremovalunsuccessful: '&cThe removal of the jail %0% was unsuccessful because there are prisoners in there, please release or transfer them first.'
     jailremoved: '&9Jail %0% has been successfully removed.'
     nocell: '&cNo cell found by the name of %0% in the jail %1%.'
     nocells: '&cNo cells found in the jail %0%.'